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•Figure 2. Effects of RSV on MPO activities, wet/dry weight ratios,
histopathologic features, and neutrophil infiltration and activation
of lungs in mice after LPS-induced ALI. C57BL/6 mice were treated
with RSV (100 mg/kg body weight, intraperitoneally) or an equal
volume of vehicle. Six h after instilling LPS or 0.9% saline into the
trachea, the mouse lungs were harvested for measurement of (A) MPO
activityand(B)wet/dryweightratios.(C)Representative photomicrographs
of lungs from (I) sham-operated mice injected with vehicle, (II) sham-
operated mice injected with RSV, (III) ALI animals injected with vehicle,
and (IV) ALI animals injected with RSV. Mouse lungs were resected and
subjected to hematoxylin and eosin (HE) staining as well as
immunofluorescent detection for lymphocyte antigen 6complex locus
G6D (Ly6G) and 4-hydroxynonenal (4-HNE). The 4′,6-diamidino-2-
phenylindole (DAPI) stain was used for localizing nuclear DNA. RSV
significantly attenuated pulmonary damage, neutrophil infiltration, and
oxidative stress.
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